Investments in Joint Ventures (Aggregate Balance Sheet And Statement Of Income Data For Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2020		Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Fees earned for property and asset management, construction, development, and other services to joint ventures		$ 1,900		$ 1,500	$ 3,800		$ 3,000
Total assets		688,600			688,600			$ 685,000
Total third-party debt		501,600			501,600			496,900
Total equity		157,700			157,700			$ 153,400
Total revenues (1)	[1]	30,700		32,800	63,000		65,200
Net income		2,900		3,900	7,400		7,800
Income (Loss) from Equity Method Investments		$ 1,600	[2],[3]	$ 1,900	$ 3,755	[2],[3]	$ 3,821

[1] Total revenues for the three and six months ended June 30, 2020 includes approximately $1.3 million of Resident Relief Funds payments which was recorded as a reduction to property revenues.

[2] Equity in income excludes our ownership interest of fee income from various services provided by us to the Funds.

[3] Equity in income for the three and six months ended June 30, 2020 includes our ownership interest of the Resident Relief Funds payments of approximately $0.4 million.